1906.] Recently -Discovered African Arrow Poison. 39 



maximum point it was interrupted by a very slight fall with, slowing of the 

 heart and increased size of the beats. 



Heart Beats. — Before the injection was given the rate of the heart beats 

 was 153 per minute. During the period of large heart beats the rate was 

 114 per minute, the size of the variations in pressure being 12 mm. Hg. 



